I use KVM.
I successfully passed R11e-5HacT and it works fine.
However, I can't make any of wired ethernet cards work.
I have two ethernet cards:
e1000e: Intel(R) PRO/1000 Network Driver
igb: Intel(R) Gigabit Ethernet Network Driver
If I just install Linux as guest OS, everything works fine and Linux "sees" all three NICs.